Reusable extractor-stopper for laboratory glassware



FIG. 1 is a top perspective view of a reusable extractor-stopper for laboratory glassware, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a cross sectional view thereof, taken along line 3--3 of FIG. 2;

FIG. 4 is a bottom plan view thereof.

The broken line disclosure of a portion of a flask in FIG. 3 is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a reusable extractor-stopper for laboratory glassware, as shown and described. 